Spinning cap



Oct. 5, F, W, KOS I'ER ET L I SPINNING CAP Fiied Sept. 15,1941

5 I I 1 0 W ///V 2 4 0/ a W 6 l M/ OO|\J\\\.V H u l 2 4 INVENTORS. F'REDER/EK WILLIAM K05 TEE BY HENRY H. B/TLER Patented Oct. 5, 1943 UNITED STATES PATENT OFFICE 2 331300 SPINNING GAP Frederick William Roster, Meadville, Henry H. Bitler, Moylan, and Alvin Lodge, Meadville, Pa.,

assignors to American Viscose Corporation,

.Wilmington, Del., a corporation of Delaware Application September 13,1941, Serial No. 410,666 Claims. (c1. 57-127) This invention relates to spinning caps. More particularly the invention relates to spinning caps provided with means for adjusting the tension on the yarn being delivered to the collecting bobbin.

' In winding yarn on a bobbin by means of a spinning cap, it is found that as the yarn builds up on the bobbin the tension on the yarn decreases, particularly in the outer layers, which results in variation in yarn properties. This is due partly to the decrease in the friction of the yarn passing over the edge of the spinning cap. The yarn passes over the edge of the spinning cap in a direction at an angle to the spinning cap which has a component radial to the spinning cap and a component tangential to the spinning cap. As the layers of yarn build up vide an improved spinning cap having means for maintaining the tension on the yarn being deing relative to the shaft by the pin [2 which projects into the slot H5 in the upper end of the shaft. This arrangement enables the spinning cap and the inner shell to be removed as a unit when it is desired to replace the bobbin. The

spinning cap and the inner shell are provided with arcuate slots 8 and 9 adjacent the lower edge which are positioned relative to each other so that the slots intersect. An auxiliary ring member lb of greater diameter than the rim 2 is carried by the spinning cap by the pins ll having the heads I4 which extend through the intersecting portions of the slots. The spinning cap may be rotated relative to the inner shell by the shaft 5 which may be turned by hand or by some suitable driving means operating in timed relation to the bobbin rotating means. On

livered to the bobbin as the layers of yarn build upon the bobbin.

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawing.

spinning cap fits on the square portion l3 at the upper end of the vertical shaft 5 which passes through the hollow stationary shaft 6 on which the bobbin revolves. The bobbin is revolved and reciprocated up and down by means not shown but which are conventional in cap spinning machinery. The spinning cap is mounted on an inner shell I which is supported 'on the upper end of the shaft 6 and is prevented from rotat- I the guide l5 to the collecting bobbin 4. The

rotating the spinning cap relative to the inner shell, the intersecting portions of the slots through which the ring carrying pins extend shift longitudinally of the spinning cap causing the auxiliary ring to be moved longitudinally of the spinning cap. Y

At the start of the spinning operation the spinning cap is positioned relative to the inner shell so that the auxiliary ring is in its upper position as shown in Figure 2. As the yarn builds up on the bobbin the spinning cap is rotated relative to the inner shell by the shaft 5 which lowers the auxiliary ring adjacent the ring of the spinning cap to the position shown in Figure 1. This in effect increases the diameter of the ring of the spinning cap which increases the radial component of the direction of the yarn passing over the ring and in turn increases the tension of the yarn being delivered to the bobbin. This is accompanied by an increase in the size of the balloon of the yarn which also increases the tension on the yarn.

While a preferred embodiment of the invention has been shown it is to be understood that changes and variations may be made without departing from the spirit and scope of the invention as defined by the appended claims.

What we claim is:

1. A spinning cap having a rim portion, an anspinning cap for moving the annular member on the spinning cap from an inoperative position to a position adjacent the rim portion.

2. A spinning cap having a rim portion and slots adjacent the rim portion, an annular member of larger diameter carried by the spinning cap, a shell-like member positioned in the spinning cap having angularly extending portions adjacent the slots in the spinning cap, members carried by the annular member extending through the slots into engagement with the angularly extending portions of the shell-like memher, the spinning cap and the shell-like member being arranged so that one may be rotated relative to the other to move the annular member in a longitudinal direction on the spinning cap.

3. A spinning cap having a rim portion and slots adjacent the rim portion, an annular member of larger diameter carried by the spinning cap, a shell-like member positioned in the spinning cap having angularly extending slots adjacent the slots in the spinning cap and members carried by the annular member extending through the slots in the spinning cap and the shell-like member, the spinning cap and the shell-like member being arranged so that one may be rotated relative to the other to move the annular member in a longitudinal direction on the spinning cap. I

4. A spinning cap having a rim portion and angularly extending slots adjacent the rim portion, an annular member of larger diameter carried by the spinning cap, a shell-like member positioned in the spinning cap having slots adjacent to the slots in the s n negcap and extending in a transverse direction and members carried by the annular member extending through the slots in the spinning cap and the shell-like member, the spinning cap and the shelllike member being arranged so that one may be rotated relative to the other to move the annular member on the spinning cap in a longitudinal direction.

5. A spinning cap having a rimiportion and slots adjacent the rim portion, an annular member of larger diameter carried by the spinning cap, a shell-like. member positioned in the spinning cap having angularly extending portions ad- Jacent the slots in the spinning cap, members carried by the annular member extending through the slots into engagement with the angularly extending portions of the she1l-like memher, the spinning cap and the shell-like memberbeing arranged so that one may be rotated relative to the other to move the annular member on the spinning cap from an inoperative position to a position adjacent the rim portion.

FREDERICK WILLIAM KOSTER. ALVIN LODGE. HENRY H. BITLER. 

